CT scan of dermal rays of pectoral fin

A computed tomography scan showing the dermal rays of the pectoral fin of Eusthenopteron foordi, a late Devonian (roughly 375 million years ago) fish with the primitive features of tetrapods. [Research supported by National Science Foundation grants EAR 0207721, EAR 0544093, EAR 0208377 ...This is an NSF Multimedia Gallery item.
Source: NSF Multimedia Gallery - Category: Science Source Type: video